int h1=13;
int k1=12;
int m1=11;
int h2=10;
int k2=9;
int m2=8;
int h3=7;
int k3=6;
int m3=5;
int h4=4;
int k4=3;
int m4=2;

unsigned long previousMillis=0;
const long interval=500;
bool ledState=LOW;

void setup() {
  // put your setup code here, to run once:
  pinMode(h1,OUTPUT);
  pinMode(k1,OUTPUT);
  pinMode(m1,OUTPUT);
  pinMode(h2,OUTPUT);
  pinMode(k2,OUTPUT);
  pinMode(m2,OUTPUT);
  pinMode(h3,OUTPUT);
  pinMode(k3,OUTPUT);
  pinMode(m3,OUTPUT);
  pinMode(h4,OUTPUT);
  pinMode(k4,OUTPUT);
  pinMode(m4,OUTPUT);

  digitalWrite(h1, HIGH);
  digitalWrite(k1,HIGH);
  digitalWrite(m1,HIGH);
  digitalWrite(h2,HIGH);
  digitalWrite(k2,HIGH);
  digitalWrite(m2,HIGH);
  digitalWrite(h3,HIGH);
  digitalWrite(k3,HIGH);
  digitalWrite(m3,HIGH);
  digitalWrite(h4,HIGH);
  digitalWrite(k4,HIGH);
  digitalWrite(m4,HIGH);
  delay(2000); 

  digitalWrite(h1,LOW);
  digitalWrite(k1,LOW);
  digitalWrite(m1,LOW);
  digitalWrite(h2,LOW);
  digitalWrite(k2,LOW);
  digitalWrite(m2,LOW);
  digitalWrite(h3,LOW);
  digitalWrite(k3,LOW);
  digitalWrite(m3,LOW);
  digitalWrite(h4,LOW);
  digitalWrite(k4,LOW);
  digitalWrite(m4,LOW);
}



void loop() {
  // Handle k2 dan k4 blinking
  unsigned long currentMillis = millis();
  
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    ledState = !ledState;
    digitalWrite(k2, ledState);
    digitalWrite(k4, ledState);
  }

  digitalWrite(h1, LOW);
  digitalWrite(m3, LOW);
  digitalWrite(k3, LOW);
  digitalWrite(k1, LOW);
  digitalWrite(h3, HIGH);
  digitalWrite(m1, HIGH);
  delayNonBlocking(6000);
 
  digitalWrite(k1, HIGH);
  digitalWrite(k3, HIGH);
  delayNonBlocking(2000);
  digitalWrite(h3, LOW);
  digitalWrite(m1, LOW);
  digitalWrite(k1, LOW);
  digitalWrite(k3, LOW);
  digitalWrite(h1, HIGH);
  digitalWrite(m3, HIGH);
  delayNonBlocking(6000);

  digitalWrite(k1, HIGH);
  digitalWrite(k3, HIGH);
  delayNonBlocking(2000);

}

// Non-blocking delay function
void delayNonBlocking(unsigned long delayTime) {
  unsigned long start = millis();
  while (millis() - start < delayTime) {
    // Handle k2 dan k4 blinking during non-blocking delay
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis >= interval) {
      previousMillis = currentMillis;
      ledState = !ledState;
      digitalWrite(k2, ledState);
      digitalWrite(k4, ledState);
    }
  }
}